From AdWeek:

One of the great ads of the past decade was the  2009 Johnnie Walker spot, filmed in a single take, with the brilliant Robert Carlyle telling the brand's history while strolling in the Scottish Highlands. Now, the whiskey brand and BBH have crafted another captivating single-take spot—a year-end meditation that looks forward, rather than backward, by showing a man walking through his dreamlike vision of 2015.

They did some 50 takes in three days.